var xmlHttpfunction;
function submitInfo()
{ 
	 var nameText = document.getElementById('nameText');
	 var emailText = document.getElementById('emailText');
	 var phoneText = document.getElementById('phoneText');
	 var messageText = document.getElementById('messageText');
	
     xmlHttp=GetXmlHttpObject()
     if (xmlHttp==null)
     {
         alert ("Browser does not support HTTP Request, please use FireFox 2, IE 7 or up")
         return;
     }
     var url="contactAJAX.php";
	 var query = "?nameText=" + nameText.value + "&emailText=" + emailText.value + "&phoneText=" + phoneText.value + "&messageText=" + messageText.value;
	 url = url + query;
     
     xmlHttp.onreadystatechange=stateChanged;
     xmlHttp.open("GET",url,true);
     xmlHttp.send(null);
}

function stateChanged() 
{ 
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    { 
	    var messageForm = document.getElementById('messageFeedBack');
		var message = xmlHttp.responseText;
		if(message == "successful"){
		    var contactFormFieldSet = document.getElementById('contactFormFieldSet');
			contactFormFieldSet.style.display = 'none';
			message = "your message is sent successfully<br/>thanks for your information";
			// change width to refresh safari browser
		    window.resizeBy(-1,0);
		}
		messageForm.innerHTML=message;
		messageForm.style.display = 'block';
    } 
}

function GetXmlHttpObject()
{
    var xmlHttp=null;
    try
    {
    // Firefox, Opera 8.0+, Safari
        xmlHttp=new XMLHttpRequest();
    }
    catch (e)
    {
    //Internet Explorer
        try
        {
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}